Which Regex engine is used?

We use the native JavaScript engine in the browser. It supports the vast majority of modern Regex constructs.

Regular Expression Tester (Regex)

Test and validate your regular expressions (Regex) in real time against example texts.

What is the Regex Tester?

Regular Expressions (Regex) are powerful patterns used to find, extract and replace text. Our tester allows you to write your Regex pattern, apply flags (like g, i, m) and instantly test against any test string.

Common Use Cases

Validate email formats, passwords or CPFs.
Extract domains from a list of URLs.
Find and replace patterns in large blocks of text.

Perguntas frequentes

Which Regex engine is used?: We use the native JavaScript engine in the browser. It supports the vast majority of modern Regex constructs.

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Escrito por:: Equipe Ferramenta Grátis

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Online Regular Expression (Regex) Tester